In a small project - team leader. In the model based on "the mythical man-month" there is a project librarian.
It depends on the way the project leader works - sometimes the workload of liaison with users and keeping track of the project means the PM needs to offload some work to an administrative person.
However, the responsibility always resides with the Project Leader.
by
Nidal Hamed , Project Manager , ICC Construction Company
tracking the work of the managment
project manger with his assistances and the planner
project manger follow the major progress
the assistace follow the details
the planner modify the plan as the circusmances